Final answer:
The plan of care for a patient on lithium should include regular checks of renal and thyroid function ( option b), given the impact of lithium on these systems. Monitoring serum potassium levels is not standard for lithium patients unless clinically indicated. While fine hand tremors can occur with lithium use, they do not typically necessitate stopping the medication.
Step-by-step explanation:
The plan of care for a patient who takes lithium includes periodic laboratory monitoring of renal and thyroid function. Lithium can affect thyroid and kidney function, hence the importance of regularly checking these systems to avoid potential side effects such as hypothyroidism or renal impairment. Note that while serum potassium levels are critical in maintaining electrolyte balance and cardiac function, routine monitoring of serum potassium is not specifically required for patients on lithium unless indicated by other factors.
Fine hand tremors are a common side effect of lithium and do not necessarily require discontinuation of the medication. Instead, the healthcare provider may adjust the dose or consider other interventions. Restricting daily sodium intake is generally not recommended, as lithium is handled by the kidneys in a way similar to sodium; a low-sodium diet could lead to increased lithium retention and potential toxicity.